Henry h



HENRY ""H, GRI-nner, or AUBURN, New YORK,

i Letters .Patent No. 75,678, dated March 17, 1868.

IMPROVRMENT IN smv-MILLS.

lEile Segnali maar it it that @tetten ttent'na uiting @at nf tige trae.

tro ALL weon IT MAY CONGE-RN:

Be it knownv that I, HENRY H.Y GRYIDLE, of the city of Auburn, in thecounty 'of Cayuga, and Stateiof New York, havelinven'ted certain newand'useful Improvements in Saw-Mills; and I hereby declare that thefollowing'is a full, clear, and enact descri ption ther-cot, anrl'oi'the operations, thereof, reference being had to theaecompanyingdrawings, in which-f-A Figure l is a birdsfeye view ot'` .the saw-mill.

Figure 2 is a'side Vview of the headblock,as seen'from the front end ofthe carriage.

Figure 3`iepresents the machinerylfforgiving the reverse orgiggingbackmotion to the carriage.

Figurei represents the slide-bar, and the springs attached thereto.

Figure 5 represents viewof the-.under side ofthe head-block, with thedogs in' position to catch between the teeth of the sliding rack.

Figure 6 represents a. side view of Figure 7 represents a that side.

the lhcad-block, as seen from the rear end of the" carriage.

rIhe nature of my inventio'nconsists, first, in placing the carriageupon-wheels made rigid with their axles,`

sidetvie-w of a sectionof the carriage, when somewhat elevated from litssupport-'on and so arrangingthe axlesas that, 'when `the carriage `ismoved or gig'ged back, the log will be moved or deilected u laterallyfron-tithe said Wheels to any requireddistance, andlprevet 'allscratching of .the log by the saw, and.

all dullingoi the saw-teeth when gigging back second, in constructingand arranging the different parts of th'eJock-lever, so that one4 endthereof4 shall hold the friction-shaft, with its friction-pulley, andthe otherlend .thereof shall hold the tightening-pulley, and soconstructing the head of' said `rock-lever as to enable the operator tochange the height'of'the tighteningpnlley,vand thus'iaccommodate it* tothe varying leng'th` oi' the backing-belt; third, in constructinganderran'ging mechanism so as to prevent the head-blockWV from moving,

when the .automatic Asettingapparatns is in motion, while gigging back,and enabling the operator, by means of the same mechanism, to moveeither head-block independent of the other 5 4fourth, in constructingand arranging m'echanismjsoasat all times, when desired, thosecure themovement of the head-block towards the saw, when th'e automaticsetting-apparatus is in mo'tion,{and the`lset is being-given to the log.

` In order to carry into practical operation the rst' part of" myinvention, place bearings uponv the underside of the carriage whichcarries the,v log, to receive `the ends of the axles A. Upon eac'h'endof these axles 'I kcast a wheel, a, with a fiange upon the' inner sidethereof, to control the lateral Ymovement of the carriage.

Instead of setting these axles at lright :angles with the sides of thecarriage, I set them slightly diagonal'there with, the ends thereofnearest the'saw'being slightly inclined toward the rear end ofthecarriage, so that, when the carriage is moving forward with the log, theiange -upon'the inner Wheels'Will press steadily and firmlyV against theinsideof the rail uponwhich that wheel is tracking, and thus keep thecarriage steadily in its place while' the saw is in operation;. but' assoon as the movement of the carriage is reversed in ggging back, thisdiagonal arrangement of the axles 4causes the carriage to deti'ecti'romthe saw until the anges of the outer wheels are caused to press againstthe inside of the rail upon which they are tracking, and thus the log isdeflected from-thevsaw, so that, when giggingback, the Saw'will nottouch the side of the log, and all scratching of the loganddnlling ofthe saw-teeth when 'giggingbackare avoided. i i

In order to carry intopraotcal operation the second part of`my'invention, I constructthe rock-lever B with a swivel box,l hung byset-'screws upon the under side of the end thereof, which supports thefriction-shaft CZ. I supportlsaid rock-lever upon the frame' in theusual manner. Upon the other end, c, of this rock-lever, I'attac'h atightening-pulley, b, the stud whereof` passesV through this end, c, oi'the rock-lever, and is fastened thereto by a screw and nut.` In order topermitrthis tightening-pulley b to be adjhsted, so as toaccommodate itto the varying lengthu of the belt, I make the end, c, of my rock-lever,in the form of a slot, 1) so that the stud of the tightening-pulleymaybe let down or raised up at the pleasure of the operator, and he canthus at any time'vary the height towhichthe tightening-pulley can beraised, Vand thereby accommodate 'this pulley to the varying lengthofthe belt, and prevent the necessity of lengthening or shortening thebelt. i A In order to carry into-practical operation the third part ofmy invention, I construct myh'eattblock with a-ratcbet-wheel, q, andpinionfa, upon the sam? `shaft, which pinion engages with the racka,said rack being attached ,rigidly to the rear side of the beam uponwhich the head-block is supported. Upon the frontside ef the head-blockI attach the hand-lever n, and to that I attach the pawl @which maylie-made to engagewith the teeth of the ratchet-wheel g,^or may bedetached therefrom at pleasure. To the sidev of this 'hand-lever n Iattach the spring o, which, by its pressure upon the pawl p, keeps it inits Aplace when it is Vintended that it should engage with the teeth of'the said ratchet-wheel q.

The effect and operation of this machinery and its arrangementare asfollows: When the automatic settingapparatus is in motion, as thecarriage is gigged back, the pawl p engages with the teeth oftheratchet-whe'el q, and prevents that wheel from turning, and thuspreventing the head-block from' being moved backwards.

By this same mechanism, as thus arranged, either head-block may be'movedforward, by the use of the hand-lever n, independent of the other, andthis operation is performed as follows: The paw] p being in its-l place,engaged with the teeth of the ratchet-wheel q, and being held in itsplace by the spring -o, when the handlever is moved from the saw, itcauses the pawl p lto press against and turn the ratchet-wheel q, andtherefore the pinion u engages with the rack z, which being xed rigidlyto the beam upon which the head-block` slides, the head-block ismovedtoward the saw, and thus' the operator may at any time set 4the logat either end, independent of the other. y l y In order to carry intopractical operation the fourth part of my invention, I entend the frontside of my head-block downwards, so as to admit of placing therein thedogs t. v {In-a full-sized-headblo'ck four. are generally used.) I cutout pieces `from said extended portion, so asto admit these dogs, andallow them sudicient room to play easily therein. v I then inserttherein the dogs t, hung upon a pin inserted through them, forward ofthe centre thereof. Upon the front side of the beam upon'which thehead-bl`ock is supported, I place a sliding rack, Z, with teeth upon theouter Vface thereof, -the centre of each tooth being lone-fourth of'aninch from the centre of the tooth next thereto.' Under the centre of.this slide rack Z, and attached rigidly thereto, I place an auxiliaryrack, with seven teeth thereon, to be engaged with the segment-pinion c.Uponthe end leveror arm, which is moved by the automaticsettingapparatus, I attach a 'segment-pinion, k, which engages with saidauxiliary rack. Over the dogs t I place the slide-bar r, and iipon'thisslide-bar are rigidly attached thesprings s, corresponding in numberwith 4the dogs t intended to be used, andzcach so located as when theslide-bar r is moved to its fullest extent towards the saw, the springsthereto attached will eachpress'against that vpart of .the dog withwhichit comes in contact, and which it is intended to govern, so as topress'its dog awa-y from the sliding rack Z, and thus prevent it fromengaging therewith. But when said slide-bar is 'movedto its furthestextent in the opposite direction, the springs thereto attached will eachpress-against that part of the dog with which it comes in contact, so'as to press the end of its dog against said slide-rack Z, -and thuspermit the 'end thereof to fall between the teeth upon said rack Z; butI so locate these dogs t that no' two of them shall ever be engagedbetween the teeth of the slide-rack Zat thesame time, and therebyrendering it certain lthat said slide-bar Z can never be moved for a.greater distance than the one-sixteenth of one inch without letting -theend of one of these dogs pass between the teeth upon said bar, unlesswhen said dogs are pressedl back-from said slide-bar. p o

The operation of this mechanism, as thus arranged, is as follows: Whenthe automatic setting-apparatus is in motion, as the. carriage is movedforward, the end lever or-arm, to which the segment-pinion 7c isattached,

is moved towards the saw, and its teeth engage with the teeth of theauxiliary rack attached to the under side of the slide-rack Z, and movesaid slide-rack Z towards the saw;l and if one o i these dogs tis at thesame time engaged between the teeth upon the said slide-rack l, thehead-block must necessarilyv bemoved to the same Aextent as theslide-rack Z; but if the said dogs t shall all be disengaged fromseidslide-rack l, the head-block will' remain unmoved. When't becomesnecessary'to' move the head-block from the saw, the' pzwl p isdisengaged from the ratchet-wheel q, the slide-bar r is moved tothe fullextentv toward the saw, and the dogs t'thus prevented from engagingbetween the teeth of the slide-rack Z, and 'hence the head-block willthen be free to be moved in either direction.

Fora description ofthe other parts of my saw-mill,'reterence is herebymade to the specifcationsand drawings annexed to Letters Patent grantedtoine for improvementsin head-blocks for saw-mills bearing date thefirst day of May, 1866, and numbered 54,330.

Having thus described the component'parts of' my invention and theirseveral functions, and also the mode of operation and eiect theieof,what I claim therein as new, and desire to secure by Letters Patent, is-

1. l.he combination'of the lever f, shaft E, and its connecting-links,with the pivoted arm B, carryingin 'a slot the adjustable box, with thefriction-shaft d, andthe adjustable stud of the tightening-pulley Iz,all cou- -structed and operating substantially as described. I

2. The combination of the slide-bar r, with its springs, s, and the dogst, with theslide=rack Z, substan- -tially as and for the purposedescribed.

3. The combination of the segment-pinion It, upon theend of'the leverorarm of the automatic setting- "apparatus, with the auxiliary. rack underthe sliding rack Z, substantiallyas and for the purpose described.

' HENRY n. GRIDLEY.

Witnesses:

D. WRIGHT, W. P. WRIGHT.

